<!DOCTYPE html>
<html lang="en" xmlns:v-bind="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <span>会被覆盖？</span>
    <!--    自动渲染template内容，会覆盖app节点下的子标签内容-->
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>

let vm = new Vue({
    // el:"#app",
    data:{
        xyjPrice: 99.98,
        syjnum:1
    },
    template:'<span>jfajgahgjkakhgahgjkjafjafgajkghjag</span>'
})
vm.$mount("#app")
</script>
</body>
</html>